Out-of-Bounds Read in Linux Kernel SMB2 Write Vulnerability
CVE-2023-3865
What is CVE-2023-3865?
The Linux kernel contains a vulnerability within the ksmbd module related to processing SMB2 write requests. Specifically, the function ksmbd_smb2_check_message fails to validate the NextCommand field correctly. When NextCommand exceeds the sum of Offset and Length in a smb2 write operation, it can lead to oversized write lengths. This mismanagement ultimately allows for out-of-bounds reads, potentially exposing sensitive information in memory.

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Affected Version(s)
Linux 0626e6641f6b467447c81dd7678a69c66f7746cf < 3813eee5154d6a4c5875cb4444cb2b63bac8947f
Linux 0626e6641f6b467447c81dd7678a69c66f7746cf
Linux 0626e6641f6b467447c81dd7678a69c66f7746cf < 58a9c41064df27632e780c5a3ae3e0e4284957d1